Blog Archives

A new project is online: A frequency generator from theoretically 0.37 GHz to 3.740 GHz output frequency. It is based on the LTC6946-1 from Linear Technology, an Ultralow Noise 0.37 GHz to 3.740 GHz Integer N Synthesizer with Integrated VCO.…

This is a follow up on the previews article on the low and high pass filter designer. An algorithm is developed in order to perform interpolation. The FIR low pass filter from the last post is used in the interpolation…

This post is about digital low and high pass FIR filter design in VHDL. Implementing high/low pass filter in the digital domain has a lot of benefits compared to implementations in the analog domain. The VHDL code for an implementation…

This breakout board helps me to interface my FPGA with the DAC900E from Texas Instruments. The DAC has 165 MSPS and 10 bits which is quite some speed. The combination FPGA and DAC opens up for experiments with digital signal…

This project is a description of how to build a signal generator with an output frequency from 1kHz to 68 MHz. The frequency generation is handled by a small Programmable Oscillator from Linear Technology the LTC6903. The control of the…

This is my most advanced homemade PCB design until now. The PCB contains a EP3C5E144C8N Cyclone III FPGA from ALTERA, two 8 bit ADCs AD9057 from Analog Devices @ 80 MHz, a FTDI USB2.0 controller and many other things. The…

This project describes how to build you own Software Defined Radio (receiver part). Starting from an antenna, amplifiers, mixer, filter, ADC, FPGA a FM radio signal is received and demodulated in software. All the blocks for amplification, mixing, filtering and…